Apparatus for hammering the dies of wire-drawing machines.



R., D. CONNOR AND R. P. SLINGER. APPARATUS FOR HAMMERING THE DIES 0F WIRE DIIAWING MACHINES.

' v APPLICATION FILED FEB- 4; I9I9. 1,310,968, Patented July 22,1919.

3 SHEETS-SHEET I.

TIIE COLUMBIA PLANOORAPH co.. WASHINGTON, D. c.

R. D. CONNOR AND R. P. SL|NGER. APPARATUS FOR HAMMERING THE DIES 0F WIRE DRAWING MACHINES. APPLICATION FILED FEB. 4. I919.

1,3 1 0,968. Patented July 22, 1919.

3 SHEETS-SHEET 2.

THE COLUMBIA PLANOGRAPH cm, WASHINGTON. n. c.

R. D. CONNOR AND R. P. SLINGER. APPARATUS FOR HAMMERING THE DIES 0F WIRE DRAWING MACHINES. APPLICATION FILED FEB. 4. I9|9. 1,310,968. Patented July 22,1919.

3 SHEETS-SHEET 3.

THE COLUMBIA PLANOGRAPH 1:0. WASHINGTON, n. c.

1 while said eccentric is adjustably connected by a suitable connecting rod 8 to the aforesaid lever Z connected to the rear end of the frame m.

Upon the said cross shaft 1 is also a cam r and bearing against said cam, through an anti-friction roller, is one arm of a bellcrank lever t, the axis of the lever being journaled in bearings 15 below the machine bed (this latter being slotted), and the other arm of the lever extending forwardly below the machine bed. In the free end of such lever arm is a long regulating screw t Directly above the point of such screw is the lower end of a stout rod a, which rod passes up through a swivel bearing a mounted on the machine bed and at its upper end is pivotally connected to the said hammer-supporting frame m at a point toward the forward end of the frame. and the position of the parts are such that as the cross shaft 0 rotates (starting with the frame m raised), the frame "and hammer are lowered until the hammer bears upon the die *0 to be hammered when the hammer is moved once forwardly and backwardly half-way across the die, the cam 7' during such period being practically neutral. Immediately, however, the hammer completes its return movement, the cam r oommences to raise the hammer a clear of the die, and the eccentric r completes the rearward movement.

The aforesaid screw t on the arm of the lever arm t, below the machine bed, allows of thehammer being-lowered to different distances to suit the depth or thickness'of' the die to be hammered.

By varying the connection of the eccentric connecting rod 8 with the frame lever Z i. 6., by altering the point of connection along the slot Z the hammer may be adapted to move different distances according to the size of die to be hammered. The hammer will usually lie at an acute angle of about 80 to the top face of the die when engaging the same, i. 'e., atan angle of about 10 to the axis of the hole in the die.

Mounted upon the axis w of the belt fork lever w of the driving pulley is a lever arm w and balance weight m At its free end the lever arm is notched or stepped, whereby when the belt is on the fast pulleyit may engage a shoulder g 'on an adjacent trip lever y. This trip lever g at its other end is provided with a screw g the end or head of -which lies near to the frame-carrying lever Z.

A rod 2 connected to a further lever arm being formed on the rod 2 for convenience of manipulation.

The formation of the cam 7' Upon the said shaft T which carries the eccentric r is mounted a further cam 1*. Against such cam bears a lever arm 2' which also bears against the spindle 3 of the air valve 9, the formation of the cam r being such that during the initial and final hammering operations, the lever 2 holds the valvep fully open, but as the hammer approaches the hole in the die '0, the lever 2 al lows the valve 17 to partially close and thus moderate the force and number of theblows of the hammer,,the cam r and lover 2 reopening the valve p as the hammer a approaches the outer end of its traverse.

The-complete operation of the machine may bedescribed as followsi With a die placed in the sinking of the turn-table (Z and the machine, started by With the return movement of the eccentric,

the hammer moves back in the same path.

across the die until it reaches the outside edge,when the cam r finally raises it clear of the die. During the forward movement of the hammer thecam r gradually closes the air valve p to moderate the number and intensity of the hammer blows, to compensate for the decreased speed of the die surface being acted upon, said cam allowing the valve to open again during the reverse movement of the hammer. v 7

During the whole of the time the hammer is acting upon the die it lies at an acute angle to the axis of the hole in the .die, and therefore, the effect of the blows upon the die (as the latter rotates), is to force the metal toward the center of thedie and thus reduce the hole. Upon the frame m and hammer n reaching their rearmost position the machine is stopped by the member Z striking the lever g which trips the arm a: and allows the balance weight m to influence the belt fork and move the belt on to the loose pulley 7a. A fresh die being placedin the sinking, the machine is restarted and the cycle of movements repeated;

The depth of the sinking in the turn-table will be rather less than half that of the die, and in plan the sinking will be such as to allow the; die to be an easy fit. A small raised cone or snug5 in the center of the sinking and engaging the wider end ofthe hole in the die (see Fig. 4) serves to hold the die central to the turn-table. With the hammer always resting upon the die during the hammering operation it is found that the naroreee sinking ,is usually sufficient 1 for -keeping the die in position.

The pneumatic hammer will be of" theordinary cal-kingtool" pattern,- giving" a large number of blows per minute; That part of the hammerwhich touches thedie 'is rotated by the die and table, and therefore, wears away evenly atall points of'iits-circumference:

To clear 1 the sinking-of the turn-table o-f any scale or'd'ust; a-small air jetrPisprovided near the' sin ingi;

What-we claim-isi 1. Apparatus for closing or reducing the" holes indies used in wire drawing machines' comprising arotary" diskor turn-table adaptedto receivethe-die to behammered, a

hammer arranged with its longitudinalaxis lying at 'anacute angle-to thetopface-of the die and 1a thesameplaneasthe vertical axis of the hole "in the die'yand means whereby the hammer is automatically brought in con tact with the face of the die to hammer the die transversely across its face andsublse quent-ly rai'sed -clear of the die; substantially as described.

2; Apparatusfer closing or red iicing tl ie edge" to 'a' point nearthe hole in" the die and back again and subsequently raised clear of the die, substantially as described.

3. Apparatus for closin or reducing the holes in dies used in wire rawing machines comprising a rotary table adapted to receive the die and rotate the same about an axis coincident with the hole therein, a hammer adapted to automatically engage the die face and be traversed across the same from a point near the outer edge to a point near the hole and subsequently moved clear of the die, together with means to vary the blows as the hammer advances to and recedes from the hole in the die, substantially as described.

4. Apparatus for closing or reducing the holes in dies used in wire drawing machines, comprising a rotary table adapted to receive the die and rotate the same about an axis coincident withthe hole therein, a frame carrying a pneumatic hammer at its forward end and linked to the machine bed at its rear, an eccentric to reciprocate said frame, and cam controlled mechanism to lower the hammer on the die face during the forward stroke of the same and to raise said hELHHHQPClGtIF of the die at or near the end ofthe rearward stroke, substantially as described.

5; Apparatus for closing orred-ucing the holesin' diesused in wire drawing machines, comprising a rotary table adapted to receive the die and rotate the same about an axis coincident With the hole therein, a frame linked to the machine"bed at its rear, a pneumatic hammer pivotally connected to the frameat its forward end, an eccentric to reciprocate said frame, and cam controlled mechanism to lower the hammer on the die faced-urin'g the forward stroke of the sameand to raise sardhammer clear of the die at or near the end of the rearward stroke, substantially as ClGSCl'lbGCl.

6: Apparatus for closing or reducing the holes in dies-used in wire drawing machines,

comprising arotary table adapted to receive the di'e 'and rotate thesame about an axis coincident with the hole therein, a frame linked to the machine bed at its rear, apneumatic hammer pivotally connected to the frame at its forward end, an eccentric to reciprocate saidframe, and cam controlled mechanism to lower thehammer on the dieface during the forward stroke of the same and to raise saidhannnerclear of the die at or near the end of the rearward stroke, an

airsupply valve for said hammer and means forautomaticall y controlling said valve,

substantially as described.

7. Apparatus for closlng orreducing the holes m dies used in wlre draw-ingmachines,

comprising arotary table adapted to receive the die and rotate the same about an axis coincident with the hole therein, a-frame carrying a pneumatic hammer at its forward end and linked to the machine bed at its rear, an eccentric to reciprocate said frame, and cam controlled mechanism to lower the hammer on the die face during the forward stroke ofthe same and to raise said hammer clear of the die at or near the end of the rearward stroke, the die holding table having a sinking in its upper face to receive the die while the striker of the hammer remains in contact with and holds the die in the sinking during the hammering operation, said striker being free to be rotated by the die, substantially as described.

8. Apparatus for closing or reducing the holes in dies used in wire drawing machines, comprising a rotary disk or turn-table adapted to receive the die to be hammered, a hammer arranged with its longitudinal axis lying at an acute angle to the top face of the die and in the same plane as the vertical axis of the hole in the die, and means whereby the hammer is automatically lowered on to the die While the same is rotating and then traversed across the face of the die from a point near to its outer edge to a point near the hole in the die and back again and subsequently raised clear of the die, means being provided for varying the horizontal and vertical bodily movements of the hammer to suit the size of the die, substantially as de scribed.

9. Apparatus for closing or reducing the holes in dies used in wire drawing machines, comprising a rotary table adapted to receive the die and rotate the same about an axis coincident with the hole therein, a frame carrying a pneumatic hammer at its forward end and linked to the machine bed at its rear, an eccentric to reciprocate said frame, and cam controlled mechanism to lower the hammer on the die face during the forward stroke of the same and to raise said hammer clearof the die at or near the end of the rearward stroke, the die holding table having a sinking in its upper face to receive the die while the striker of the hammer remains in contact with and holds the die in the sinking during the hammering operation, said striker being free to be rotated by the die, means being provided for varying the horizontal and vertical bodily movements of the hammer to suit the size of the die, substantially as described.

10. Apparatus for closing or reducing the holes in dies used in wire drawing machines, comprising a rotary table adapted to receive the die and rotate the same about an axis coincident with the hole therein, a frame carrying a pneumatic hammer at its forward end and linked to the machine bed at its rear, an eccentric to reciprocate said frame,

and cam controlled mechanism to lower the hammer on the die face during the forward stroke of the same and to raise said hammer clear of the die at or near the end of the rearward stroke, together with an air blast for clearing the table, substantially as described.

11. Apparatus for closing or reducing the holes in dies used in wire drawing machines, comprising a rotary table adapted to receive the die and rotate the same about an axis coincident with the hole therein, a frame carrying a pneumatic hammer at its forward end and linked to the machine bed at its rear, an eccentric to reciprocate said frame and cam controlled mechanism tolower the hammer on the die face during the forward stroke of the same andto raise said hammer clear of the die at or near the end of the rearward stroke, the die holding table having a sinking in its upper face to receive the die while the striker of the hammer remains in contact with and holds the diein the sinking during thehammering operation, said striker being free to be rotated by the die, means being provided for varying the horizontal and verticalbodily movements of the hammer to suit the size of the die, together with an air blast for clearing the table, substantially as described.

In witness whereof we have hereunto set our hands in the presence of two witnesses.

ROBERT DUNCAN CONNOR.

ROBERT PERGIVAL SLINGER. Witnesses:

HY. JEURQA,

FRED J. MEREDITH.

Oopies'of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

